Rain gauge



FIG. 1 is a front elevational view of a rain gauge showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a vertical transverse view of my new design partly in section. 

The ornamental design for a rain gauge, substantially as shown and described. 